Twin chair



w. E. WHITE TWIN CHAIR Filed July 26, 1926 March 15 1927.

Patented Mar. 15, 1927.

WILLIAM E. WHITE, or CHICAGO, rumors, ASSIGNOR T0 KALMAN STEEL OFCHICAGO, rumors, A cosroaerion or DELAWARE. 7

COMPANY,

. TWIN CHAIR.

Application filed July as,

It will be noted that the vertical legs of,

the chair are in the form of loops, thus giving a large area of metal for reinforcement and permitting the use of relatively small gauge wire. Further, that each wire of the legs is fully anchored to the bars; and further, that the legs are sufiiciently separated to permit the entrance therebetween of the largest of the coarse aggregate in the concrete. Thus voids are eliminated, and the loops insure a perfect anchorage in the concrete.

The invention will be more readily understood by reference to the accompanying drawing, in which; 7

Fig. 1 shows a length of wire after the first bending operation, a pair of elongated loops being connected by a straight wire;

Fig. 2 is an edge View thereof;

Fig. 3 shows the condition after the second operation, the entireiupper portion of the blankbeing bent around a round mandril; V

Fig. 4 is an edge View thereof;

Figs. 5 and 6 are edge and front views respectively showing the shape after the third operation Fig. 7 is an inverted view showing the position at the completion of the final operation:

Fig. 8 is a bottom plan view thereof;

Fig. 9 is a perspective view showing the finished structure; and

Fig. 10 is a view showing aslightly modified form.

In the drawings, I have shown the steps in the production of the device in order to better illustrate its practical simplicity from a manufacturing standpoint.

As a preliminary to the first operation,a. section of wire of the proper gauge is cut and then bent by means ofa wire working machine, to the form shown in Figs, 1 and 2;

or loops, whether in parallelism or flared is twisting the wire around the bar, the portion 1e26, Serial N 12 4,973.

tion, the entire upper end of the blank is bent over toform the hooks, 18, 14:, 15, 16, at the upper'extremities of the wires consti- 6o tuting the loops, 10, 11. In this condition,"

the wire, 12, connects the extremities of the hooks, 1 1 15. In the nextoperation, the loops are oscillated outwardly around mandrils indicated at XX in Fig. 3, the loops remaining in the same planes. The condition of the blank after this operation is shown in Fig. 6, the loops having been rotated 90 degrees in a common plane, thereby forming further hooks-or folds of metal, 17, I 18. With the blank in the form shown in Figs. 5 and 6, the reinforcing bars, indicated at AB, are placed in the hooks, 13,

14, 15, 16, as shown, whereupon the loops, constituting the legs of the chair are swung 7 5 upward and inward as viewed in Fig. 5, into the position of Fig. 7, in which position all the hooks are closed and the bars closely. confined therein. Theposition of the legs 89 a matter of choice and is determined in the final operation. 7

The spacing of the chairs on the bars can be arranged as desired in order to furnish the required vertical reinforcement. The operative function of the device willbe obvious and further explanation is'deemed unnecessary. I i

In Fig. 10, I have illustrated achair of extreme simplicity, patterned after that heretofore described. Itcomprises legs, 19, having feet, 20, of such extent as to provide adequate bearing surface. At 1 the upper ends of the legs an eye, 21, is formed by of the eye beneath the bar being "connected to a cross member 22 that serves to laterally space the'bars. The stepsin the manu'fac-- ture and application of the chair shown in Fig. 10, will be obvious and no illustration thereof is made. The chair is verysimple and may be economically made and applied. -The functional advantages of the chair shown in' Figs. 1 to 9 areapparent. They include perfect anchoring of the legs in the concrete; firm and rigid connection between the loops constituting the legs and the bars, thereby assuring the full benefit of the reinforcement; perfect bonding with the concrete, broad footing on the soil; adequate bracing to prevent relative longitudinal shifting of the bars, and minimum Weight and cost for the effect secured. .l V V 7 Modifications other than those here illustrated can be made by those skilled in the art, and I do not Wish to be limited except as indicated in the appended claims. 1

I claim: 7

1. Means for holding a pair of parallel bars in spaced apart relation, comprising a length of Wire bent to provide a connecting member the ends of Which underlie said bars, the terminal portions of the Wire composing the connecting member being rebent and then bent around said bars and thence downwardly to provide supporting Iegs.

2. Means for supportingand spacing a pair of reinforcing bars,eomprising a length r of Wire bent into U shape, the legs of the U 7 being in the form of a loop, the upper ends signature.

WILLIAM E. WHITE. 

